通过应变控制电子-声子耦合效应优化二维材料/铜复合材料的导热性

IF 5.3 2区 材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY
Tianyu Zhao, Baishan Liu, Yalun Wang, Juncai Liang, Zhongzheng Pei, Xiaohui Zhang
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引用次数: 0

摘要

近年来,5G移动通信技术、大功率器件和微集成电子器件得到了快速发展和迭代。然而,在如此高的功耗下,器件的发热问题不容忽视,影响器件的正常工作,降低器件的使用寿命,严重时甚至会造成器件的损坏。铜是电子器件中应用最广泛的导热材料,但进一步改善其热性能以满足需求仍然是一个关键的挑战。具有超高理论热导率的石墨烯是与铜结合以提高其热导率的理想材料,但引入的石墨烯/铜界面带来声子/电子散射,这限制了传热。本文采用热压法制备了层压石墨烯-铜复合材料(HP - GCCs),通过控制石墨烯的分布,石墨烯/铜界面形成应力诱导的声子-电子耦合效应,从而改善了界面的声子-电子传输,从而提高了其导热性。在实际应用中,HP - gc具有440.60 W m−1·K−1的高导热系数,在器件中表现出降低温升和提高效率的特点。通过分析界面热传导机理来研究复合材料的优化石墨烯分布,为优化二维材料/铜复合材料的合成和性能提供了有价值的指导。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Optimizing the Thermal Conductivity of 2D Materials/Copper Composites through Strain‐Controlled Electron‐Phonon Coupling Effect
In recent years, 5G mobile communication technology, high‐power devices, and micro‐integrated electronic devices have developed and iterated rapidly. However, the heat generation of the devices cannot be ignored under such high‐power consumption, which affects their normal operation and decreases the lifetime, or even causes damage in severe cases. Copper is the most widely used heat conducting material in electronic devices, but further improvement of its thermal properties to match the demand is still a crucial challenge. Graphene with ultra‐high theoretical thermal conductivity is an ideal material to be combined with copper to improve its thermal conductivity, but the introduced graphene/copper interfaces bring phonon/electron scattering, which limits the heat transfer. In this work, laminated graphene‐copper composites (HP‐GCCs) are prepared by a hot‐pressing strategy, the graphene/copper interfaces can form a stress‐induced phonon‐electron coupling effect through controlling the graphene distribution, which can improve the phonon‐electron transmission of the interfaces and thus improve its thermal conductivity. The HP‐GCCs exhibit a high thermal conductivity of 440.60 W m−1·K−1, showing reduced temperature‐rise and improved efficiency when applied to devices in the practical applications. The investigations of the optimized graphene distribution of the composites through analyzing the mechanism of interfacial heat conduction provide valuable guidance for optimizing the synthesis and properties of 2D materials/copper composites.
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来源期刊
Advanced Electronic Materials
Advanced Electronic Materials NANOSCIENCE & NANOTECHNOLOGYMATERIALS SCIE-MATERIALS SCIENCE, MULTIDISCIPLINARY
CiteScore
11.00
自引率
3.20%
发文量
433
期刊介绍: Advanced Electronic Materials is an interdisciplinary forum for peer-reviewed, high-quality, high-impact research in the fields of materials science, physics, and engineering of electronic and magnetic materials. It includes research on physics and physical properties of electronic and magnetic materials, spintronics, electronics, device physics and engineering, micro- and nano-electromechanical systems, and organic electronics, in addition to fundamental research.
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